Finding the Fourth Proportional to 57,054.19, 78,728.72 and 31,556.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,054.19 : 78,728.72 = 31,556.50 : x
2. Step 2: Convert to fraction form
   57,054.19/78,728.72 = 31,556.50/x
3. Step 3: Cross multiply
   57,054.19x = 78,728.72 × 31,556.50
4. Step 4: Simplify right side
   57,054.19x = 2,484,402,694.90
5. Step 5: Solve for x
   x = 2,484,402,694.90/57,054.19
6. Step 6: Final answer
   x = 43,544.62